WA 20 or US 2 across the Cascades summer 2020?

In my opinion WA-20 over the N. Cascades is more scenic, is more remote than is US-2 over Stevens Pass, and is the safer of the two routes. Depending upon time of day, weekend vs. weekday, etc., US-2 west of the summit can be very congested and over the years has had many, many traffic fatalities. Both routes are scenic, but I recommend WA-20 for you.